A week after Hurricane Matthew stormed through the Caribbean and up along the coast of the U.S., leaving hundreds dead and thousands of homes and businesses destroyed in its path, relief efforts continue. And while many of us will not travel to areas hit hardest by the storm—Haiti, for example—airlines are now offering travelers a different way to assist: by rewarding members who donate to hurricane relief with bonus miles.

On Friday, United announced that MileagePlus members who donate a minimum of $50 to Americares, Airlink, OperationUSA, or the American Red Cross through CrowdRise can earn anywhere from 250 to 1,000 bonus miles, depending on the amount they contribute through October 21. United will give out five million of these "bonus miles," and also said it would match donations up to $100,000. (As of this writing, it has already raised $314,337 in total.) American Airlines, too, announced that AAdvantage members who donate at least $50 to the American Red Cross will receive complimentary miles, with a deadline of October 31. Delta is partnering with the American Red Cross as well, and has also extended its SkyWish program for SkyMiles members to donate miles to Matthew relief efforts, but is not offering bonus miles to those who contribute to the recovery effort, nor matching donations.

While the relief efforts are well-intentioned, there has also been outcry. Though the United Nations estimates that 350,000 Haitians are in need of assistance following Hurricane Matthew, outlets have reported that Haitians have asked donations not be made to the American Red Cross due to reported inconsistencies in the organization's previous relief efforts: After collecting nearly half a billion dollars for the 2010 Haiti earthquake and subsequently pledging to build 700 permanent homes with funds raised, a 2015 investigation from ProPublica and NPR accused the American Red Cross of only building six. Looking for other ways to donate? Check with your credit card company, as many are now allowing customers to donate their rewards or points using their card.